python - 小写列表列表

Question

我有一个列表列表:

data = [['SiteUrl','Url','Title'],['SiteUrl','Url','Title']]

如何使用 python 遍历列表并将所有内容小写？

Answer 1

使用列表理解:

data = [[x.casefold() for x in sublst] for sublst in data]

或者功能上:

data = [list(map(str.casefold, x)) for x in data]

来自 the docs :

Casefolding is similar to lowercasing but more aggressive because it is intended to remove all case distinctions in a string.